Originally Posted by brad
there are lots of plants that špreferš to get their nutrients from the substrate. Swords, lotus` etc.....All the plants will turn to the water column though, and lots of healthy leaves are nicer than lots of healthy roots
No they don't.
Folks love to say this, I've never seen any edvidence and I've had these plants for decades. I'm quite good with Crypts and swords, well, if they grow slower and do not get as large, that would be a blessing. They get too big for most tanks, so do Lotus.
I can prune off all the roots of a sword and it'll grow just fine. Same for the Crypts. No difference.
Just because a river plant has big roots, does not imply it prefers anything. The roots may just be to hold the plant in place.
But the tanks I've had these plants never had much, if any ferts and the plants grew better than anyone else's that added ferts to the substrate.........
Why would they prefer to grow better in that case if what you say is true?
This is not one tank, one year's wotrth of experience, this is many tanks over decades and over 40 species in both groups.